Martina Costa Cesari

activity

20222026

collaborators

3 papers

math.AG2026

Higher rank Gelfand-Kapranov-Zelevinsky fans

Rocco Chirivì, Martina Costa Cesari, Xin Fang +1

We define and study the higher rank GKZ-fans of point configurations, where the rank one cases coincide with the usual GKZ-fans. A point in a higher rank GKZ-fan is then used to co…

math.AG2025

Combinatorial Seshadri stratifications on normal toric varieties

Rocco Chirivì, Martina Costa Cesari, Xin Fang +1

We apply the theory of Seshadri stratifications to embedded toric varieties $X_{P} \subseteq P (V)$ associated with a normal lattice polytope $P$ . The approach presented here i…

math.RT2022

Jordan classes and Lusztig strata in disconnected reductive groups

Martina Costa Cesari

Let $G$ be a non-connected reductive algebraic group over an algebraically closed field $K$ and let $D$ be a connected component of $G$ . We investigate Jordan classes of $…